Researchers at the U. S. Army laboratories at Fort Detrick in Frederick reported a major advance yesterday in the search for a safer smallpox vaccine. An experimental vaccine made from pieces of the live virus currently used as a smallpox vaccine protected monkeys against monkeypox, their version of the fatal illness. The protection was not absolute -- the animals got mildly ill and developed the characteristic pox rash -- but it was good enough to keep them from dying. The federal government currently vaccinates many members of the military against smallpox, a disease that was eradicated 26 years ago but...
